1851 - 1q black on blue, horizontal pair, and 1s g
1851
1851 - 1q black on blue, horizontal pair, and 1s golden yellow on blue, all with white margins, from 'SIENA 31 GEN. 1854' (large single-circle with PD) to Castel del Piano. Bi-color franking of exceptional quality. Certs. A.Diena and Bottacchi (Sassone 1a+2c+pt.11 - Euro 36,250)
